Please help dababy out so I can say “less goo” again );

Can somebody me out with this question

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

What is the solution of log2  (3x  -  7)  =  3? 4 5